Project 2.Slow Mazda3

[D_Eclipse9916]

your stock redline is like 7500 right?

Stock redline soft cut was 6500 and hard cut used to be 6800. I have it soft cut 6800 and hard cut 7200 from the tune. I actually start to lose power after 6800 according to VDyno I'm assuming from lack of head flow so I barely use it unless I have to hold 3rd gear through like T9 at Summit around 7000.
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Tuner says notate power fall off after 6800 because of head flow....says 8000rpm will give you a couple ponies...huh? Those are contradictory statements.

Also, dont go the way of high revs. Your motor was not made for it, the balancer on your crank is not made to absorb those harmonics (aside from the 50 other things somebody mentioned).

Upping your Redline is only useful for
A) running out of gear, you just need a bit more to eliminate a shift (saves time)
B) You actually make power up there (not the case for this motor)

More revs is reallllly hard on a piston motor. Don't go down that path, a lot of racers actually reduce their revs to encourage reliability (I shift at 7500rpm in my S54 that revs to 8 stock). Find some other way to make power.

And do you really "need" hp? Doing a dyno reclass actually doesn't help a lot of the times. Before you go down this path, contact Greg Greenbaum and ask at your weight how much "max" hp you can make to stay at a certain point level. Back in 2010 when I requested mine, it was actually lower than what I could get with points so I didn't go that path. It is dependent on the car and Greenbaums mood that day.